mt76: mt7915: add support for continuous tx in testmode

Implement continuous tx state for MT7915 NIC testmode.
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7915/mcu.c

@@ -3208,7 +3208,8 @@ int mt7915_mcu_set_chan_info(struct mt7915_phy *phy, int cmd)
 #ifdef CONFIG_NL80211_TESTMODE
 	if (phy->mt76->test.tx_antenna_mask &&
 	    (phy->mt76->test.state == MT76_TM_STATE_TX_FRAMES ||
-	     phy->mt76->test.state == MT76_TM_STATE_RX_FRAMES)) {
+	     phy->mt76->test.state == MT76_TM_STATE_RX_FRAMES ||
+	     phy->mt76->test.state == MT76_TM_STATE_TX_CONT)) {
 		req.tx_streams_num = fls(phy->mt76->test.tx_antenna_mask);
 		req.rx_streams = phy->mt76->test.tx_antenna_mask;
 

drivers/net/wireless/mediatek/mt76/mt7915/mcu.h

@@ -240,6 +240,7 @@ enum {
 
 enum {
 	MCU_EXT_CMD_EFUSE_ACCESS = 0x01,
+	MCU_EXT_CMD_RF_TEST = 0x04,
 	MCU_EXT_CMD_PM_STATE_CTRL = 0x07,
 	MCU_EXT_CMD_CHANNEL_SWITCH = 0x08,
 	MCU_EXT_CMD_FW_LOG_2_HOST = 0x13,

drivers/net/wireless/mediatek/mt76/mt7915/testmode.c

@@ -409,6 +409,16 @@ mt7915_tm_init(struct mt7915_phy *phy, bool en)
 	mt7915_mcu_add_bss_info(phy, phy->monitor_vif, en);
 }
 
+static void
+mt7915_tm_update_channel(struct mt7915_phy *phy)
+{
+	mutex_unlock(&phy->dev->mt76.mutex);
+	mt7915_set_channel(phy);
+	mutex_lock(&phy->dev->mt76.mutex);
+
+	mt7915_mcu_set_chan_info(phy, MCU_EXT_CMD_SET_RX_PATH);
+}
+
 static void
 mt7915_tm_set_tx_frames(struct mt7915_phy *phy, bool en)
 {
@@ -425,11 +435,7 @@ mt7915_tm_set_tx_frames(struct mt7915_phy *phy, bool en)
 	mt7915_tm_clean_hwq(phy, dev->mt76.global_wcid.idx);
 
 	if (en) {
-		mutex_unlock(&dev->mt76.mutex);
-		mt7915_set_channel(phy);
-		mutex_lock(&dev->mt76.mutex);
-
-		mt7915_mcu_set_chan_info(phy, MCU_EXT_CMD_SET_RX_PATH);
+		mt7915_tm_update_channel(phy);
 
 		if (td->tx_spe_idx) {
 			phy->test.spe_idx = td->tx_spe_idx;
@@ -468,16 +474,144 @@ mt7915_tm_set_tx_frames(struct mt7915_phy *phy, bool en)
 static void
 mt7915_tm_set_rx_frames(struct mt7915_phy *phy, bool en)
 {
+	if (en)
+		mt7915_tm_update_channel(phy);
+
+	mt7915_tm_set_trx(phy, TM_MAC_RX_RXV, en);
+}
+
+static int
+mt7915_tm_rf_switch_mode(struct mt7915_dev *dev, u32 oper)
+{
+	struct mt7915_tm_rf_test req = {
+		.op.op_mode = cpu_to_le32(oper),
+	};
+
+	return mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD_RF_TEST, &req,
+				 sizeof(req), true);
+}
+
+static int
+mt7915_tm_set_tx_cont(struct mt7915_phy *phy, bool en)
+{
+#define TX_CONT_START	0x05
+#define TX_CONT_STOP	0x06
 	struct mt7915_dev *dev = phy->dev;
-	if (en) {
-		mutex_unlock(&dev->mt76.mutex);
-		mt7915_set_channel(phy);
-		mutex_lock(&dev->mt76.mutex);
+	struct cfg80211_chan_def *chandef = &phy->mt76->chandef;
+	int freq1 = ieee80211_frequency_to_channel(chandef->center_freq1);
+	struct mt76_testmode_data *td = &phy->mt76->test;
+	u32 func_idx = en ? TX_CONT_START : TX_CONT_STOP;
+	u8 rate_idx = td->tx_rate_idx, mode;
+	u16 rateval;
+	struct mt7915_tm_rf_test req = {
+		.action = 1,
+		.icap_len = 120,
+		.op.rf.func_idx = cpu_to_le32(func_idx),
+	};
+	struct tm_tx_cont *tx_cont = &req.op.rf.param.tx_cont;
 
-		mt7915_mcu_set_chan_info(phy, MCU_EXT_CMD_SET_RX_PATH);
+	tx_cont->control_ch = chandef->chan->hw_value;
+	tx_cont->center_ch = freq1;
+	tx_cont->tx_ant = td->tx_antenna_mask;
+	tx_cont->band = phy != &dev->phy;
+
+	switch (chandef->width) {
+	case NL80211_CHAN_WIDTH_40:
+		tx_cont->bw = CMD_CBW_40MHZ;
+		break;
+	case NL80211_CHAN_WIDTH_80:
+		tx_cont->bw = CMD_CBW_80MHZ;
+		break;
+	case NL80211_CHAN_WIDTH_80P80:
+		tx_cont->bw = CMD_CBW_8080MHZ;
+		break;
+	case NL80211_CHAN_WIDTH_160:
+		tx_cont->bw = CMD_CBW_160MHZ;
+		break;
+	case NL80211_CHAN_WIDTH_5:
+		tx_cont->bw = CMD_CBW_5MHZ;
+		break;
+	case NL80211_CHAN_WIDTH_10:
+		tx_cont->bw = CMD_CBW_10MHZ;
+		break;
+	case NL80211_CHAN_WIDTH_20:
+		tx_cont->bw = CMD_CBW_20MHZ;
+		break;
+	case NL80211_CHAN_WIDTH_20_NOHT:
+		tx_cont->bw = CMD_CBW_20MHZ;
+		break;
+	default:
+		break;
 	}
 
-	mt7915_tm_set_trx(phy, TM_MAC_RX_RXV, en);
+	if (!en) {
+		req.op.rf.param.func_data = cpu_to_le32(phy != &dev->phy);
+		goto out;
+	}
+
+	if (td->tx_rate_mode <= MT76_TM_TX_MODE_OFDM) {
+		struct ieee80211_supported_band *sband;
+		u8 idx = rate_idx;
+
+		if (chandef->chan->band == NL80211_BAND_5GHZ)
+			sband = &phy->mt76->sband_5g.sband;
+		else
+			sband = &phy->mt76->sband_2g.sband;
+
+		if (td->tx_rate_mode == MT76_TM_TX_MODE_OFDM)
+			idx += 4;
+		rate_idx = sband->bitrates[idx].hw_value & 0xff;
+	}
+
+	switch (td->tx_rate_mode) {
+	case MT76_TM_TX_MODE_CCK:
+		mode = MT_PHY_TYPE_CCK;
+		break;
+	case MT76_TM_TX_MODE_OFDM:
+		mode = MT_PHY_TYPE_OFDM;
+		break;
+	case MT76_TM_TX_MODE_HT:
+		mode = MT_PHY_TYPE_HT;
+		break;
+	case MT76_TM_TX_MODE_VHT:
+		mode = MT_PHY_TYPE_VHT;
+		break;
+	case MT76_TM_TX_MODE_HE_SU:
+		mode = MT_PHY_TYPE_HE_SU;
+		break;
+	case MT76_TM_TX_MODE_HE_EXT_SU:
+		mode = MT_PHY_TYPE_HE_EXT_SU;
+		break;
+	case MT76_TM_TX_MODE_HE_TB:
+		mode = MT_PHY_TYPE_HE_TB;
+		break;
+	case MT76_TM_TX_MODE_HE_MU:
+		mode = MT_PHY_TYPE_HE_MU;
+		break;
+	default:
+		break;
+	}
+
+	rateval =  mode << 6 | rate_idx;
+	tx_cont->rateval = cpu_to_le16(rateval);
+
+out:
+	if (!en) {
+		int ret;
+
+		ret = mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD_RF_TEST, &req,
+					sizeof(req), true);
+		if (ret)
+			return ret;
+
+		return mt7915_tm_rf_switch_mode(dev, RF_OPER_NORMAL);
+	}
+
+	mt7915_tm_rf_switch_mode(dev, RF_OPER_RF_TEST);
+	mt7915_tm_update_channel(phy);
+
+	return mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD_RF_TEST, &req,
+				 sizeof(req), true);
 }
 
 static void
@@ -507,6 +641,9 @@ mt7915_tm_set_state(struct mt76_phy *mphy, enum mt76_testmode_state state)
 	else if (prev_state == MT76_TM_STATE_RX_FRAMES ||
 		 state == MT76_TM_STATE_RX_FRAMES)
 		mt7915_tm_set_rx_frames(phy, state == MT76_TM_STATE_RX_FRAMES);
+	else if (prev_state == MT76_TM_STATE_TX_CONT ||
+		 state == MT76_TM_STATE_TX_CONT)
+		mt7915_tm_set_tx_cont(phy, state == MT76_TM_STATE_TX_CONT);
 	else if (prev_state == MT76_TM_STATE_OFF ||
 		 state == MT76_TM_STATE_OFF)
 		mt7915_tm_init(phy, !(state == MT76_TM_STATE_OFF));

drivers/net/wireless/mediatek/mt76/mt7915/testmode.h

@@ -56,4 +56,44 @@ enum {
 	TM_MAC_RX_RXV,
 };
 
+struct tm_tx_cont {
+	u8 control_ch;
+	u8 center_ch;
+	u8 bw;
+	u8 tx_ant;
+	__le16 rateval;
+	u8 band;
+	u8 txfd_mode;
+};
+
+struct mt7915_tm_rf_test {
+	u8 action;
+	u8 icap_len;
+	u8 _rsv[2];
+	union {
+		__le32 op_mode;
+		__le32 freq;
+
+		struct {
+			__le32 func_idx;
+			union {
+				__le32 func_data;
+				__le32 cal_dump;
+
+				struct tm_tx_cont tx_cont;
+
+				u8 _pad[80];
+			} param;
+		} rf;
+	} op;
+} __packed;
+
+enum {
+	RF_OPER_NORMAL,
+	RF_OPER_RF_TEST,
+	RF_OPER_ICAP,
+	RF_OPER_ICAP_OVERLAP,
+	RF_OPER_WIFI_SPECTRUM,
+};
+
 #endif